The Letters of Sigmund Freud (1960), edited by Ernst L. Freud, includes a selection from Sigmund Freud's prolific lifelong correspondence to family, friends, and colleagues.

In The Ego and the Id (1923), Freud elaborates upon his fundamental theory of the basic structure of the human psyche, composed of the id, the ego, and the superego.

Dreams (1974) is a collection of Carl Jung's papers on dream psychology.

Sigmund Freud: His Life in Pictures and Words (1978), edited by Ernst Freud, Lucie Freud, and Ilse Grubrich-Simitis, includes a wide array of photographs from throughout Freud's life, as well as a biographical sketch by K. R. Eissler.

In The Interpretation of Dreams: Freud's Theories Revisited (1987), Laurence M. Porter explores critical responses to Freud's theories of dream analysis from the perspective of developments in the field of dream psychology throughout the late twentieth century.